Rotary Unions GPS Series
GPS Series 4-Passage Rotary Unions & Joints
*Some applications using Chemical or water-based media may require alternative sealing materials. Applications above 220° F (105° C) require alternative seal materials. Please consult with DSTI for approval.
![Max. Pressure: 7,500 PSI [515 BAR]](/images/content/main/product_icon_tag_check.svg){kind=icon}
7,500 PSI [515 BAR]The 4-passage, GPS Series rotary unions feature specialized sealing technology suitable for vacuum and bidirectional pressures and four independent flow passages capable of transferring different media types simultaneously.
The stainless steel construction is suitable for hydraulic, pneumatic, coolant, water, and other corrosive media types. Carbon steel models are available for applications that do not require water or corrosive media transfer (see GP Series).
GPS 4-passage models come with NPT threaded connections and consist of a unique shaft configuration for easy installation, allowing the choice of mounting the shaft connections using the threaded passages or O-ring face seal glands for flush mounting the union to an interface.
Need to combine fluid with electrical power, signal and/or data transfer? No problem. The GPS Series rotary unions are designed to integrate directly with our standard electrical slip rings. See options.
Configurations
| Part # | Connection | Passage Size | Diameter | Length | Through Bore | Min. Torque* | Part Downloads | Information |
|---|---|---|---|---|---|---|---|---|
| GPS-140 | 1/8"-27 NPT | 0.156" [3.962 mm] | 2.687" [68.25 mm] | 4.696" [119.279 mm] | None | 1.9 ft-lbs [2.58 Nm] | Buy Now | |
| GPS-141 | 1/8"-27 NPT | 0.156" [3.962 mm] | 2.937" [74.6 mm] | 4.735" [120.269 mm] | 0.500" [12.7 mm] | 3.2 ft-lbs [4.34 Nm] | Buy Now | |
| GPS-240 | 1/4"-18 NPT | 0.250" [6.35 mm] | 3.187" [80.95 mm] | 6.118" [155.398 mm] | None | 6.6 ft-lbs [8.95 Nm] | Buy Now | |
| GPS-241 | 1/4"-18 NPT | 0.250" [6.35 mm] | 3.750" [95.25 mm] | 6.327" [160.706 mm] | 0.750" [19.05 mm] | 9.5 ft-lbs [12.88 Nm] | Buy Now | |
| GPS-340 | 3/8"-18 NPT | 0.375" [9.525 mm] | 3.875" [98.425 mm] | 6.980" [177.292 mm] | None | 9.5 ft-lbs [12.88 Nm] | Buy Now | |
| GPS-341 | 3/8"-18 NPT | 0.375" [9.525 mm] | 4.187" [106.35 mm] | 7.372" [187.249 mm] | 0.750" [19.05 mm] | 11.9 ft-lbs [16.13 Nm] | Buy Now | |
| GPS-440 | 1/2"-14 NPT | 0.500" [12.7 mm] | 4.250" [107.95 mm] | 8.247" [209.474 mm] | None | 11.9 ft-lbs [16.13 Nm] | Buy Now | |
| GPS-441 | 1/2"-14 NPT | 0.500" [12.7 mm] | 4.937" [125.4 mm] | 8.592" [218.237 mm] | 0.750" [19.05 mm] | 20.3 ft-lbs [27.52 Nm] | Buy Now | |
| GPS-540 | 3/4"-14 NPT | 0.750" [19.05 mm] | 5.250" [133.35 mm] | 9.730" [247.142 mm] | None | 20.3 ft-lbs [27.52 Nm] | Buy Now | |
| GPS-641 | 1"-11.5 NPT | 1.000" [25.4 mm] | 7.187" [182.55 mm] | 12.190" [309.627 mm] | 1.000" [25.4 mm] | 40.7 ft-lbs [55.18 Nm] | Buy Now |
*Minimum torque required to rotate based on zero pressure with Oil/Hydraulic media (or Air/Gas media for SPS Series). Required torque to rotate may be greater when using other media types or dry running. For specific torque requirements, please contact DSTI to discuss your application.
Technical Specifications
Maximum Pressure
7,500 PSI [515 BAR]
Maximum Speed
500 RPM
Maximum Vacuum
30 HG
Temperature Range
0° F to 220° F [-18° C to 105° C]
Suitable Media*
Air/Gas, Chemical, Coolant, DI/Tap Water, Oil/Hydraulic, Water/Glycol
Connection Type
NPT
*Some applications using Chemical or water-based media may require alternative sealing materials. Applications above 220° F (105° C) require alternative seal materials. Please consult with DSTI for approval. All values listed under Technical Specifications are dependent on a combination of all application parameters. Please note operational life is dependent upon both rotational speed and duty cycle. Contact DSTI if your application requires operating close to the maximum rotational speed with a continuous duty cycle. Applications with temperatures above 220° F (105° C) require alternative seal materials. The use of Water media with temperatures above 212° F (100° C) require alternative seal materials. Please consult with DSTI regarding your specific application requirements.
Available Options
Custom Modifications
Easier and less expensive than you may think. We can modify our standard products to fit your project requirements.
Learn More
Electrical Slip Ring Integration
Get the complete package. We offer a wide range of electrical slip rings designed to directly integrate with our GPS Series rotary unions.
View Options
